Display screen or portion thereof with icon



The sole FIGURE is a front view of a display screen or portion thereof with icon showing our new design.

The innermost broken lines illustrate portions of a graphical user interface and a display screen or portion thereof, and form no part of the claimed design. The remaining broken lines illustrate an electronic device, which is the environment of the design, and form no part of the claim. 

CLAIM The ornamental design for a display screen or portion thereof with icon, as shown and described. 